Inhalation mask



FIG. 1 is a perspective view of an inhalation mask showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a side elevational view thereof, the opposite side being identical;

FIG. 4 is a top plan view thereof; and

FIG. 5 is a bottom plan view thereof.

The undisclosed inner surface of the inhalation mask is unornamented and follows the contours of the outer surface as indicated. 

The ornamental design for an inhalation mask, as shown and described. 